Clinical and radiological outcomes of acetabular revision with the Delta Revision TT cup

Abstract

Introduction: This study evaluates mid-term results of acetabular revision using a hemispherical acetabular cup in Trabecular Titanium with a cage construct. Methods: We reviewed 36 acetabular revisions performed with the Delta Revision TT cup in 34 patients (mean age = 75, range: 45-92 years). Acetabular defect types (Paprosky classification) included (1) 2B (n = 5), (2) 2C (n = 7), (3) 3A (n = 15), and (4) 3B (n = 9). Morcellised bone allografts were used in 24 cases, and synthetic bone used in 11. Outcomes were evaluated using the Harris Hip Score (HHS), and the Verbal Rating Scale (VRS) for pain measurement. X-ray visualisation of cup position was used to discern signs of mobilisation and bone graft incorporation. Survivorship at post-revision follow-up (mean = 39.8; range 12-91.5 months) was calculated. Results: HHS increased from 40.5 to 87 (p < 0.01). 68% of cases were pain free; by comparison, 32% had an average VRS score of 1.9 (range 1-3). The average cup inclination angle was 40.8° (30-52°) postoperatively, compared with 41.2° (30-52°) at follow-up; there were no signs of loosening or mobilisation. Centre of rotation was fully restored in 21 (58.3%) hips. According to Gie classification; bone graft incorporation grades were (1) 3 (n = 21), (2) 2 (n = 12) and (3) 1 (n = 2). The survival rate was 100% for aseptic loosening and 91.7% for any cause of revision. Conclusions: The Delta Revision TT cup promises good clinical and radiographic results at short-to mid-term followup, with high rates of survival rate and bone integration.

Characterization of dimensional, morphological and morphometric features of retrieved 3D-printed acetabular cups for hip arthroplasty

“…Perticarini et al [13] found that 99.3% of the Delta TT cups used in 134 THA and 8 revision cases were radiographically stable at a mean follow-up period of 72.7 months; dislocation occurred in two cases, aseptic loosening in one patient. Munegato et al [15] described good clinical and radiographic results at short-to mid-term follow-up (mean period 39.8 months), with three cases of dislocation.…”

“…Recent clinical studies of 3D-printed cups have shown good outcomes [12][13][14][15]; however, no laboratory studies have previously characterized the whole components. On the contrary, several studies have investigated the biocompatibility and suitability of 3D-printing to produce porous structure for orthopaedic applications, but these were limited to cylindrical or cubic specimens [7,[16][17][18][19][20][21][22][23][24][25][26],…”

Primary or revision arthroplasty with an integrated acetabular cup—MUTARS® RS cup system

“…This is a substantial improvement over the cementation of a polyethylene cup into a revision cup, such as the Burch Schneider ring. The modularity of the applied MUTARS ® RS CUP system makes it possible to correct the inlay position, the center of hip rotation and to minimize the risk of dislocation [ 19 , 20 ] (Fig. 4 ).…”

A prospective radiostereometric analysis of the stability of a metal-backed glenoid component/autograft composite in reverse shoulder arthroplasty

“…This titanium implant has shown excellent osseous integration in animal models and has been used successfully in revision hip surgery. 1,3,16,[30][31][32][33] It is composed of a 3D hexagonal lattice of titanium with high porosity (Figure 4a), manufactured using electron beam melting and designed to mimic cancellous bone. The highly porous titanium optimizes press-fit in bone due to high friction.…”